Description
BECM-163 : INTRODUCTORY STATISTICS
Course Code : BECM-163
Assignment Code: ASST/BECM 163/ 2025-26
Total Marks: 100
Assignment I
Answer the following Descriptive Category Questions in about 500 words each. Each question carries 20 marks. Word limit does not apply in the case of numerical questions. 2 x 20 = 40
1) (a) Calculate mean, median and mode from the following data.
(b) Calculate the coefficient of variation from the data given above.
2) Distinguish between sample survey and census. Describe the steps you would follow in collecting data though a sample survey. Prepare a small questionnaire for collection of income and expenditure levels of households.
Assignment II
Answer the following Middle Category Questions in about 250 words each. Each question carries 10 marks. Word limit does not apply in the case of numerical questions.
3) (a) Describe the important properties of a standard normal variable.
(b) Find out the area under the standard normal curve for each of the following (use z-table). Sketch each one of them.
(i) between z = – 0.43 and z = 0.78
(ii) between z = 0.44 and z = 1.50
(iii) to the right of z = – 1.33.
4) Fit a straight line (𝑌 = 𝑎 + 𝑏𝑋) to the following data. Compare the estimated values of the dependent variable with its actual values.
5.What are the steps that you should keep in mind while constructing a price index? What are the properties that an index number should fulfil?
Assignment III
Answer the following Short Category Questions. Each question carries 15 marks. 2 x 15 = 30
6) Write short notes on the following in about 100 words each:
(a) Contingency table and chi-squared test
(b) Properties of a good estimator
(c) Measurement of skewness
7.Differentiate between the following:
(a) Simple Random Sampling and Stratified Random Sampling
(b) Type I and Type II errors in hypothesis testing
(c) Level of significance and confidence level in hypothesis testing
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